Patricia Giles, 52, pleaded guilty just before sentencing to leaving the scene of an accident resulting in death, a Class C felony, and falsifying physical evidence, a misdemeanor, according Michael Roberts, deputy district attorney for Penobscot County.

She began serving her sentence at the Penobscot County Jail immediately, he said late Tuesday afternoon.

In addition to jail time, Superior Court Justice William Anderson sentenced Giles to two years of probation. Conditions of probation include not driving for six months and substance abuse counseling, Roberts said.

The plea agreement between Roberts and Giles’ attorney, Zachary Brandmeir of Bangor, called for her to be sentenced to three years in prison with all but nine months suspended on the felony charge and a concurrent sentence of 90 days on the misdemeanor charge, according to Roberts.

“This was a just outcome because we had evidence that she caused the accident but no evidence that by staying at the scene the outcome of the accident would have changed,” Roberts said Tuesday afternoon.

By pleading guilty, she admitted that she struck Joshua R. Constantine, 37, of Bangor, a longtime employee of a downtown business, as he crossed Main Street near the entrance to Shaw’s supermarket around 10:30 p.m. Saturday, June 2.